I wouldn’t use my personal phone. There have been a few times (not AMPs) where I’ve gotten a text message weeks later “hey daddy, I’m back in town today if you want to visit (followed by 5 heart emojis)”.
I use a Talkatone, which is an app that gives you a free burner number for talk/text. I just keep notifications turned off.
Not sure if there is an advantage to the burner phone/SIM card, but the app seems to get the job done.